The details of the requirements have been published on
this web site.
The problem that exists is that these requirements refer to the JAA ATPL(H) exams which are not yet available. The CAA have an interim system in place for civvy helicopter pilots which involves taking the fixed wing JAA ATPLs with rotary P of F tacked on. They say they are working on a similar interim system for the military and will announce it 'soon'.
Once it is announced it will take a few weeks to get the courses ready. Expect them to be mostly based on distance learning. The likely providers will be Oxford, Cabair and us (Bristol).